JPH07113378B2 - Detachable coupling device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detachable coupling device, and more specifically, a hole extending axially inward and a radial direction opening in the hole. A boss member having an opening, a shaft that fits into a hole of a boss member that has a set groove that extends in the circumferential direction on the outer surface, and a lock position that partially protrudes inward from the opening and engages with the set groove of the shaft. A locking element radially movably arranged in the opening so as to be positioned at an outer coupling / disengageable position that does not engage with the set groove, and a set ring axially movably arranged on the boss member. And the set ring is axially biased by a spring to keep the locking element in the locked position at all times.

This type of coupling device, when inserting the shaft to be coupled to the boss member, while holding the set ring on the boss member by hand and moving it in the direction opposite to the direction in which the set ring is inserted,
If you search the shaft so that it will go into the hole of the boss member and move the boss member together with the joint yoke, the shaft will automatically be held in the locked position, and set the same when pulling out the boss member from the connected shaft. Since it is only necessary to hold the ring by hand and move the boss member axially while moving the boss member in the direction opposite to the pulling direction, the boss member can be moved away from the shaft. When used at the output end of a tractor to drive a working machine, it is useful to connect the boss member with a joint yoke of a universal joint connected to the agricultural work equipment and the output shaft of the tractor. Further, when the other vehicle is simply towed, the shaft of the vehicle and the shaft of the tractor can be detachably connected.

(Problems to be Solved by the Invention) However, although the shaft for transmitting the rotational power is used in various machines, the connecting portion is generally narrow in many cases and a cover is often provided to prevent contamination,
Ligation and dissociation procedures are difficult and often dangerous. In order to solve such a problem, various devices have been proposed for safely and securely connecting the shafts. Among them, when the shaft is inserted into the boss member or pulled out from the boss member, the shaft can be easily connected or disconnected by simply sliding the set ring in the axial direction. The apparatus is, for example, JP-A-61-41017, JP-A-61-52420, JP-A-61-84410 and Japanese Patent Application No. 60-
No. 194722 (U.S. Patent Application No. 779,268, filed September 23, 1985) is proposed in the specification and drawings initially attached to the application.

However, these have a large number of parts, a complicated structure, a long time is required for assembling the coupling device, and a large amount of cost is required for manufacturing the coupling device. While moving it to the front side of the handle, check the existing position of the shaft with your hand and move the boss member together with the universal joint so that the shaft fits into the hole of the boss member while pressing it. Since it is complicated and cannot satisfy all of them, its improvement has been desired.

Therefore, according to the present invention, the shaft can be coupled and disengaged only by a simple operation of axially moving the set ring in the same direction as the direction in which the boss member is moved at the time of coupling and uncoupling, and the number of parts is small. It is an object of the present invention to create a reliable and detachable coupling device which has a simple and compact structure and which can securely and securely perform shaft coupling and uncoupling.

[Means for solving problems]

According to the present invention, the above-mentioned problem is solved in the detachable coupling device of the above-mentioned type, in which two independent inclined surfaces, whose diameters increase or decrease as they extend in the axial direction, are the outer surface of the boss member or the inner surface of the set ring. Or provided on the outer surface,
Two spring rings, a portion of which respectively abuts against the set ring or the boss member, are in pressure contact with the inclined surface, respectively, and when the shaft is inserted into or withdrawn from the hole of the boss member, one of the spring rings moves on the inclined surface. This is achieved by the structure in which the set ring automatically returns to the locked position from the coupling / releasing position by sliding.

Further, according to the second invention of the present application, the problem is that the inclined surface, whose diameter increases or decreases as it extends in the axial direction on both sides, and which is joined at the minimum or maximum diameter portion, is the outer surface of the boss member or the set ring. One spring ring, which is provided on the inner surface or the outer surface of the set ring and is partially engaged with the inner surface of the set ring having no inclined surface or the groove provided on the outer surface or the inner surface of the boss member, is pressed against the inclined surface. In addition, the spring ring slides on the inclined surface when the shaft is inserted into or pulled out from the hole of the boss member, so that the set ring automatically returns to the locked position from the connectable / disconnectable position. Can be achieved.

[Action]

According to this configuration, the spring ring that holds the set ring with one hand and is engaged with the inclined surface with the force of contracting or expanding at the lock position is generated by the cam action by the engagement with the inclined surface in the axial direction. When the spring ring is slid axially on the inclined surface so as to expand or contract the spring ring against the component force, the locking element reaches a connectable / disconnectable position in which the locking element can move outward. When the shaft is inserted into the hole of the boss member or pulled out from the hole of the boss member in this state, the locking element is pushed by the shaft and comes out from the setting groove of the shaft and moves outward. When the shaft is further inserted into or pulled out of the hole of the boss member, the cam action of the spring ring causes the spring ring to slide down on the inclined surface to reach the end of the inclined surface and be carried by the spring ring. The set ring will automatically return to the locked position.

Therefore, at the time of use, simply hold the set ring by hand and move the boss member while moving the set ring in the same direction as moving the boss member so that the shaft enters or leaves the hole of the boss member. It is possible to connect and disconnect the shaft and the boss member. Further, since the number of parts is small and the structure is simple, the manufacture and assembly thereof are extremely easy, and the coupling and uncoupling of the shaft can be performed safely and reliably. In addition, when the boss member is moved such that the shaft is inserted into the hole of the boss member or the shaft is separated from the hole of the boss member, the set ring is moved in the direction of moving the boss member to perform the coupling and uncoupling operation. Since it is possible to perform the reverse operation, that is, as compared with the conventional operation that requires the operation of moving the boss member while holding the set ring in the direction opposite to the direction in which the boss member is moved, Also, the operation required for dissociation is easy, and it is excellent in ergonomics.

〔Example〕

An example in which the removable coupling device according to the present invention is applied to the coupling between the output shaft of the tractor and the boss member of the universal joint connected to the agricultural equipment driven by the tractor is shown, but the present invention is not limited to this. Not a thing.

Hereinafter, embodiments will be described in detail with reference to the drawings.

In order to drive an agricultural work machine connected to a tractor through a universal joint in FIGS. 1 to 6, an output shaft of the tractor having a spline and a boss member having a joint yoke of the universal joint are coupled with each other. A detachable coupling device for is shown. This coupling device comprises a boss member 5 having a joint yoke 2 and a shaft 6, and has a hole 4 in which the boss member 5 accommodates the shaft 6 and extends in the axial direction, and an opening 7 extending in the radial direction and opening in the hole 4. is doing. A locking element (a ball 8 in the present example, but another shape, for example, a columnar shape having hemispherical portions at both ends) 8 is arranged in the opening 7, and the locking element 8 is provided. A part of the boss member 5 is projected to engage with a set groove 10 provided on the shaft 6,
Are prevented from slipping out (see FIG. 5).

The boss member 5 is formed in a columnar shape, and has an inclined surface (which starts from the end of the opening 7 on its outer surface and increases in diameter as the distance from the opening 7 increases) on both sides of the opening 7 and extends independently in the axial direction ( 28, 128) are provided at three locations at substantially equal intervals in the circumferential direction. The boss member 5 can be formed in a polygonal column shape, and the inclined surface 28 is shifted in phase by about 60 degrees with respect to the opening 7 in the circumferential direction. The length, width and inclination angle of the inclined surface 28 can be arbitrarily set in accordance with the required situation.

A set ring 12 is arranged on the cylindrical portion 21 of the boss member 5 so as to be movable in the axial direction (indicated by an arrow P in FIG. 1), and the set ring 12 is provided inwardly at its center. It has a protrusion 30 for holding the protruding ball 8 in the locked position. In order to hold the set ring 12 in the position shown in FIG. 1, the slit 33 and the flat portion 50 as shown in FIG.
In addition, two spring rings 24 and 124 having a substantially triangular shape having a corner portion 51 and having an inward contracting force are arranged on the boss member 5, and these spring rings 24 and 124 are arranged.
The flat portion 50 is in pressure contact with the inclined surfaces 28 and 128, and the other portions including the corner portions 51 are side surfaces 26 and 126 of the protruding portion 30 of the set ring 12.
Abutting against each other. Since the spring rings 24 and 124 have a force to contract inward, the set ring 12 is pressed from both sides and held at the position shown in FIG.
The set ring 12 and the spring ring 24 are configured so as not to come off from the boss member 5 by the stopper 18 provided at the end of the boss member 5.

The state shown in FIG. 1 is a state before the spline shaft 6 is still inserted into the hole 4 of the boss member 5. Ball 8 in this state
In order to prevent the ball from falling into the spline hole 4 of the boss member 5, the inner end of the opening 7 for accommodating the ball 8 is, for example, the first
As shown in the figure, it is small so as to have an inner surface of 60 °.

To insert the spline shaft 6 into the boss member 5, hold the set ring 12 by hand and push the set ring 12 in the direction of moving the boss member so that the shaft 6 fits into the hole 4 of the boss member 5 and the boss member 5 and the boss member 5 are inserted together. Move the member. That is, as shown in FIG. 4, the set ring 12 is moved toward the spline shaft, that is, to the right in FIG. 1, against the axial component force generated by the engagement of the spring ring 24 with the inclined surface 28. Be done. In this position, since the protrusion 30 for pressing the ball of the set ring 12 is located away from the ball 8, the ball 8 can be moved outward. When the spline shaft 6 is inserted in this state, since the chamfered portion 132 is provided at the tip of the spline shaft 6, the ball 8 is pushed outward by the cam action of this chamfered portion, so the spline shaft 6 is inserted into the spline hole. Can be inserted in 4. In this coupling / disengaging position of the set ring 12, the spring ring 124 is in the original position, so that the corner portion 51 abuts on the ball 8 and the ball 8 does not drop outward. If the spline shaft 6 is inserted further deeper, even if the set ring 12 is released in this state, the set ring 12 will be replaced by the spring ring 24.
Although it returns slightly to the left as seen in FIG.
As is clear from the figure, since the ball pressing projection 30 of the set ring 12 engages with the ball 8 pushed outward by the spline shaft 6, the set ring 12 cannot move to the left any further.

FIG. 5 shows the lock position where the set ring 12 is held by hand, the spline shaft is further inserted, and the ball 8 is dropped into the set groove 10 of the spline shaft 6, and the ball 8 is set in the set groove of the spline shaft 6. It is completely within 10. Since the ball 8 has moved inward in this manner, the action of preventing the return of the set ring disappears, and the set ring 12 returns to the original position. Moreover, in this case, the spring rings 24 and 12
4 is slid and positioned to the bottom of the inclined surfaces 28 and 128, so that the set ring 12 can be stably held. The protrusion 30 for pressing the ball of the set ring 12 is located on the outer side in the radial direction of the ball 8 and prevents the ball 8 from coming off the set groove 10 of the spline shaft 6. Therefore, the spline shaft 6 is formed in the hole of the boss member 5. I can't get out of 4.

Next, when pulling out the spline shaft 6 from the hole 4 of the boss member 5, while holding the set ring 12 by hand and pulling the set ring in the direction of pulling out the set ring so that the boss member 5 is separated from the shaft 6, the spline shaft 6 and the joint yoke 2 are pulled together. The member 5 is moved.
In this case, as shown in FIG. 6, the set ring 12 resists the axial component force generated by the spring ring 124 engaging the inclined surface 128 on the side opposite to the spline shaft 6, that is, on the left side in FIG. Then moved. At this position, since the ball pressing protrusion 30 of the set ring 12 that has pressed the ball 8 is located away from the area of the opening 7, the ball 8 can move outward, but the spring ring 24 is in the original position. Therefore, the ball 8 does not fall out. When the boss member is removed from the spline shaft 6 in this state, the ball 8 is pushed outward by the concave surface of the set groove 10 of the spline shaft 6. Further, by pulling out the spline shaft 6, the ball 8 is disengaged from the set groove 10 of the spline shaft 6 and moved outward, so that the shaft 6 can be completely pulled out from the hole 4 of the boss member 5. As a result, the ball 8 can freely move inward inside the opening 7 of the boss member 5, so that the restoring force of the spring ring 124 causes the projection 30 for pressing the ball of the set ring 12 to press the set ball 8 inward. While the first
Return to the position shown in the figure.

2 is a sectional view taken along the line I--I of FIG. 1, and FIG. 3 is a detailed view of the spring rings 24 and 124. The number of the inclined surfaces 28 and 128 provided on the outer surface of the boss member 5, the shape of the spring ring and the number of the flat portions 50 engaging with the inclined surfaces 28 and 128 are not limited, but as in the embodiment of FIGS. Stability is good if three or more locations are provided.

The spring rings 24 and 124 are annular and have a spring force.
It should be noted that this may be any number of layers, but in view of space, a single layer is preferable as in the embodiment of FIGS.

The cross sections of the spring rings 24, 124 may be arbitrary, but a circular cross section is generally preferable because of the sliding contact with the inclined surfaces 28, 128.

The spring rings 24 and 124 can be made of steel such as spring steel or an organic material having elasticity such as nylon. The shape of the ball 8 may be a polyhedron such as a roller or a bow roller, but it is desirable that one end is spherical and the other end is a ball retainer of the set ring 12 in order to engage with the ball set groove 10 of the spline shaft 6. Since it is sufficient to engage with the flange 30, for example, a cylindrical shape may be used, but a commercially available ball is the cheapest.

The balls 8 may be steel balls, but may be made of plastic that does not easily wear. The number of balls 8 is 1 or 2
The number may be one, but if three or more are provided as in this embodiment, stability is good. As the stop ring 18, a commercially available snap ring can be used. Further, in order to limit the insertion depth of the spline shaft 6, a shaft stop ring 32 may be provided on the spline shaft 6 as well.

Another embodiment is shown in FIG. 7, which is similar to that of FIGS. 1-6, but with the inclined surfaces 28, 128 extending axially from the region of the radial plane in which the opening 7 lies. The only difference is that they are placed separately. In this case, the set ring 12 is also extended in the axial direction, and a flange portion 130 with which the spring rings 24, 124 abut is provided inside the extended portion, so that between the protrusion portion 30 and the flange portion 130. A recess 40 for accommodating the ball is formed in the coupling / disengaging position. In the case of this example, the length in the axial direction is larger than that of FIGS. 1 to 6, but the sealing property of the joint is improved. FIG. 8 shows an embodiment similar to that shown in FIG. 7, in which the inclined surfaces 28, 128 are provided on the outer surface of the boss member 5 on the side of the joint yoke 2 with an enlarged diameter. The set ring 12 also extends to the region of the inclined surfaces 28 and 128, and has a flange portion 130 that extends inward toward the inclined surfaces.

9 and 10 show an example in which the inclined surfaces 28 and 128 are formed on the member 48 integrally attached to the boss member 5. 9th
As is apparent from the drawing, an annular member 48 having a U-shaped cross section is fixed onto the boss member 5, and the cylindrical outer surface of the annular member 48 is provided with independent inclined surfaces 28 and 128, respectively.
The set ring 12 is also provided with a flange portion 130 which extends inwardly between the inclined surfaces 28 and 128, and the flange portion 130 has an inclined surface 28,128 of the spring rings 24,124.
The portions except for the flat portion 50 that is pressed against are in contact with each other.
Further, in FIG. 10, the inclined surfaces 28 and 128 are provided on the inner surface of the annular member 48 similar to that in FIG. 9, and in this case, the spring rings 24 and 124 having the expanding force are used. , The corner portion 51 is pressed against the inclined surfaces 28 and 128, and the flat portion 50
The other portion including is in contact with the flange portion 130 provided on the set ring 12. The spring ring used in these examples has the same function as shown in FIGS. That is, since the spring ring has a force of contracting or expanding, the flat portion 50 or the corner portion 51 of the spring ring 24, 124 has the inclined surface 2.
The set ring 12 is held in the axial direction through the flange portion 130 by the cam action of sliding the 8, 128 to the bottom. These examples are advantageous because they do not require special processing for forming the inclined surface on the boss member.

The coupling device shown in FIGS. 11 and 12 is such that the inclined surfaces 28, 128 provided on the outer surface of the boss member 5 start from the region of the opening 7 and decrease in diameter as they extend in the axial direction. Are formed and each is circumferentially offset from the region of the opening 7 by about 60 degrees. Therefore, the direction of inclination of this inclined surface is opposite to that shown in FIGS.
Spring rings 24,124 used in this embodiment
Is the same as that shown in FIG. 3, and the flat portion 50 is pressed against the inclined surfaces 28 and 128 with a contracting force. The set ring 12 has an E-shaped cross section having a central ball pressing projection 30 and flanges 36 and 136 formed at both ends. Since the spring rings 24, 124 have the force to contract, the spring rings again have the cam action of causing the flat portion 50 to slide down on the inclined surfaces 28, 128 to the bottom, so that The periphery of the corners 51 of 24 and 124 contact the flanges 36 and 136 of the set ring 12, respectively, and hold the set ring 12 axially in the lock position where the ball holding protrusion 30 of the set ring is located on the opening 7. ing. The binding and dissociation operations are the same as in the above-mentioned examples. That is, hold the set ring by hand and
All that is necessary is to move the connecting / disconnecting position shown in the drawing to the right (or the left) and insert the boss member 5 into or remove the boss member 5 from the shaft 6. After the insertion or the withdrawal is completed, the set ring 12 automatically returns to the locked position.

The coupling device shown in FIGS. 13 to 16 is a combination of the one shown in FIGS. 11 and 12 and the one shown in FIGS. 7 to 10. Figure and No. 13
Correspondences are shown in FIG. 8, FIG. 14 and FIG. 14, FIG. 9 and FIG. 15, and FIG. 10 and FIG. That is, in FIG. 13, the inclined surfaces 28 and 128 are separated by a distance L from the radial region where the opening 7 exists.
Formed on the boss member 5 by moving only in the axial direction, the spring rings abut the side surface of the ball pressing protrusion 30 and the flange 136, respectively, and hold the set ring 12 in the locked position. In FIG. 14, inclined surfaces 28, 128 are provided on the outer surface of the boss member 5 on the joint yoke side with an enlarged diameter, and the set ring 12 also extends to the area of the inclined surface. In the end area of the spring ring 2
It has flanges 36 and 136 with which the periphery of the corners 51 of 4 and 124 abut.

In FIG. 15, the inclined surfaces 28 and 128 are provided on the outer surface of the annular member 48 integrally attached to the boss member 5, and similarly, the set ring 12 extends to the area of the inclined surfaces 28 and 128. The flat ring 50 is pressed against the inclined surfaces 28 and 128, and the periphery of the corner 51 of the spring rings 24 and 124 is set ring 12.
It abuts the flanges 36, 136 and holds the set ring 12 in the locked position. The coupling device shown in FIG. 16 has an inclined surface on the inner surface of the annular member 48 which is also fixed to the boss member 5.
28 and 128 are formed, and the flat portion 50 is the set ring 12
Spring rings 24,124 abutting flanges 36,136 of
The corner portion 51 of the is pressed against the inclined surfaces 28 and 128.

Since the coupling / dissociation operation and action of the coupling device shown in FIGS. 13 to 16 are the same as those of the previously described embodiment, the description thereof will be omitted here.

In FIG. 17 to FIG. 19, the inclined surfaces 28 and 128 have the set ring 12
An example of arrangement on the inner surface of is shown. On the inner surface of the set ring 12, in a region outside the radial plane where the opening 7 of the boss member 5 is present, an inclined surface 28 which starts from both sides of the ball pressing protrusion 30 and whose diameter decreases as it extends in the axial direction 28 , 128 are provided independently at three locations in the circumferential direction, and substantially triangular spring rings 24, 124 having flat portions 50 and corner portions 51 as shown in FIG. 13 are expanded. It is arranged with the power to do. On the outer surface of the boss member 5, notched surfaces 29 and 129 that engage with the flat portions 50 of the spring rings 24 and 124 to prevent the spring from rotating are shifted in phase by about 60 degrees in the circumferential direction from the region where the opening 7 exists. At least one pair (three pairs in this example) are provided, and the notched surfaces 29 and 129 allow the flange 160 to project in the radial direction.
Of the spring ring 24, 124, in which the corner portion 51 is pressed against the inclined surfaces 28, 128, the flat portion 50 of the spring ring 24, 124 abuts the side surface of the flange 160 to hold the set ring 12 in the locked position in the axial direction from both sides. There is. When connecting the shaft 6 and the boss member 5, similarly to the above-described embodiment, the set ring 12 is first held by hand and is axially moved against the axial component force of the spring rings 24 and 124 as shown in FIG. Move to position. Then, since the protruding portion 30 of the set ring 12 is engaged with the corner portion 51, the spring ring 124 is carried in the axial direction, while the flat portion 50 of the spring ring 24 abuts the side surface 26 of the flange 160. Since the corner portion 51 slides on the inclined surface 28, the corner portion 51 presses more strongly. In this state, the hole of the boss member 5 is fitted to the shaft 6 (state of FIG. 19). Here, even if you release your hand from the set ring 12, the set ring 12 remains in the same position,
The connection is completed simply by inserting the boss member deeper into the shaft 6. In this case, when the ball 8 engages with the set groove 10 of the shaft 6, the spring ring 24 slides on the inclined surface 28,
The set ring 12 is automatically returned to the lock position shown in the figure.

The inclined surfaces 28 and 128 are shown in FIGS.
A coupling device formed corresponding to the embodiment shown is shown. That is, in FIG. 20, the inclined surfaces 28, 128 are axially moved from the region of the opening 7 by L in comparison with those in FIGS.
The only difference is that they are separated. The set ring 12 is extended by L in the axial direction, and the spring ring is inside the extended portion.
A flange 130 with which the periphery of the corner 51 of each of 24 and 124 abuts is provided, whereby the protrusion 30 and the flange 130 for pressing the ball are provided.
A recess 40 capable of accommodating the ball 8 is formed therebetween. Then, the flange 160 on the boss member 5 is also L in the axial direction.
It is provided with a shift.

21 is similar to the previous one, but the set ring 12 is extended to the outer surface of the boss member 5 on the joint yoke 2 side, and the inclined surface is formed on the inner surface of the extended portion.
28 and 128 are provided, and similarly, the inner flange 130 of the set ring 12 and the flange 160 on the boss member 5 are correspondingly formed.

In the twenty-second aspect, the inclined surfaces 28 and 128 are independently provided on the outer surface of the set ring 12 with a flange 130 radially outward in the region of the opening 7 sandwiched therebetween. 7, the flat portion 50 of the spring ring 24, 124 is inclined so as to decrease its diameter toward the central region of the inclined surface 28, 1
The periphery including the corner portion 51 is in pressure contact with 28, and is in contact with the side surfaces 26 and 126 of the flange 160 provided on the boss member 5. In this case, the spring ring is arranged with a contracting force.

Since the coupling / dissociation operation and action of the coupling device shown in FIGS. 20 to 22 are the same as those already described, the description thereof will be omitted here.

The coupling device of FIGS. 23 and 24 is similar to that shown in FIGS. 17 to 19 with the sloping surfaces 28, 128 at the set ring 12.
Are provided on the inner surface of the base plate at three circumferentially spaced positions. However, these inclined surfaces differ from those in FIGS. 17 to 19 in that they start from the protrusion 30 for pressing the ball radially outward of the opening 7 and increase in diameter as they extend in the axial direction. And the tilt direction is reversed. In this case, the spring rings 24, 124 have the force to expand and the corners 5
1 is pressed against the inclined surfaces 28 and 128, respectively, and at least one position of the flat portion 50 is provided on the notch surface 29 for preventing the spring ring from being provided on the boss member 5 and the side surfaces 26 and 126 of the stoppers 18 and 118. It abuts and holds the set ring 12 in the locked position from both sides. Hold the set ring 12 by hand,
In the coupling / disengageable position shown in FIG. 24, which is moved to the right against the axial component force of the spring ring 24, since the flange 136 of the set ring 12 is engaged with the corner portion 51, the spring ring 124 On the other hand, since the flat portion 50 of the spring ring 24 is in contact with the side surface 26 of the stopper 18, the corner portion 51 is slid on the inclined surface 28, and the spring ring is further pressed. 24 set ring 12
Is engaged with the protruding portion 30 of the. In this state, when the boss member is moved so that the shaft 6 is inserted into the hole 4 of the boss member 5, when the ball 8 enters the set groove 10 of the shaft 6, the expanding force of the spring ring 24 causes the set ring 12 to move. Automatically returns to the locked position.

FIG. 25 is a modification in which the inclined surface in the above-described embodiment is provided with a distance L from the area of the opening 7 as shown in FIGS. It is the same as the one in Figure 24.

The coupling device of FIG. 26 is the same as that of FIGS.
In addition, it is a modified example as shown in FIG. That is, the set ring 12 is extended to the outer surface of the boss member 5 on the joint yoke 2 side, and the set ring 12 is extended to the inner surface of the extended portion by the 23rd
And inclined surfaces 28, 128 as shown in FIGS. 24 and 24, and the notch surface 29 and the stoppers 18, 118 are similarly formed on the boss member 5.

FIG. 27 corresponds to that of FIGS. 9, 15 and 22,
The inclined surfaces 28 and 128 shown in FIGS. 23 and 24 are provided on the outer surface of the set ring 12. In this case as well, the spring rings 24 and 124 have a force to contract, and the flat portion 5
0 is pressed against the inclined surface, and the corner portion 51 is in contact with the stubbers 18 and 118.

In the above embodiments, the set ring 12 is shown as having an integral structure, but as shown in FIG.
, Each of which can be composed of a separate sleeve 12A and a protruding portion 30A, not only these can be formed of not only steel but also hard rubber or plastic, etc., it is also possible to easily think of a combination thereof. it can.

Further, in all the above-mentioned embodiments, the inclined surfaces 28 and 128 are formed as independent flat surfaces extending in the axial direction, and the spring rings 24 and 124 are also formed at the three corner portions 51 and the flat portion 50. However, since the inclined surface and the spring ring can have various shapes, representative examples thereof are shown below, but the present invention is not limited to these. .

The embodiment of the coupling device shown in FIGS. 29 to 31 is substantially the same as that shown in FIGS. 1 to 6, but starting from the area of the opening 7 and increasing in diameter in each axial direction. The extending inclined surfaces 28 and 128 are formed as conical surfaces over the entire outer circumference of the boss member 5, and the spring ring 24,
The difference from the above-described embodiment is that 124 has a substantially circular shape having a slit 33 and three convex portions 150. In this case, the spring rings 24, 124 have a force to contract, holding the set ring 12 axially in the locked position by sliding on the inclined surfaces 28, 128 respectively, and The convex portion 150 is arranged so as to be located on the opening 7 of the boss member. Therefore, even if the set ring is held by hand and the set ring is moved in the axial direction against the axial component force of the spring ring, the convex portion of one spring ring
150 holds the ball 8 and can prevent the ball 8 from falling out.

32 to 34, the boss member 5 having the conical inclined surfaces 28 and 128 as described above is combined with the substantially triangular spring ring as shown in FIG. The device is shown. In this case, as is clear from FIGS. 33 and 34, at least 1 is provided on each of the inclined surfaces 28 and 128 of the boss member 5.
One notch surface 29, 129 is provided, and this notch surface 29, 1
The flat portions 50 of the spring rings 28 and 128 are engaged with 29, and serve as a detent for the boss member 5 of the spring rings. This detent is a spring ring 24, 12
This is to prevent the flat portion 50 of 4 from being located in the area of the opening 7. Since the spring rings 24, 124 also have a contracting force, they slide on the inclined surfaces 28, 128 and the notched surfaces 29, 129 having a similar inclination, and the spring rings 24, 124 are located at the bottom, The corner portion 51 abuts the side surfaces 26, 126 of the protruding portion 30 of the set ring 12.

35 to 37 show a coupling device in which a conical inclined surface and a circular spring ring are combined. The spring rings 24, 124 have a slightly wider circular shape having an abutment portion 33, have a contracting force, the inner surface is pressed against the inclined surfaces 28, 128, and the outer portion is a protrusion for pressing the ball of the set ring 12. Department
Abutting on 30.

It goes without saying that the combination of the inclined surface and the spring ring shown in FIGS. 29 to 37 can be applied to all the embodiments shown in FIGS. 1 to 28.

Next, an embodiment according to the second invention of the present application will be described.

The removable coupling device shown in FIGS. 38 to 43 is similar to the one described above in that a spline is formed for driving the agricultural working machine connected to the tractor through the universal joint. It is for connecting the output shaft of the tractor and the boss member provided with the joint yoke of the universal joint. This coupling device includes a boss member 5 having a joint yoke 2 and a spline shaft 6, and an axially extending hole 4 in which the boss member 5 accommodates the shaft 6 and three radially extending holes opening in the hole 4. Has an opening 7. A locking element, that is, a ball 8 is arranged in the opening 7, and a part of the ball 8 protrudes inward from the opening 7 and engages with a set groove 10 provided in the shaft 6 to form a boss. The shaft 6 is prevented from slipping out of the member 5.

On the outer surface of the boss member 5, three inclined surfaces 28 are formed at substantially equal intervals in the circumferential direction by shifting the phase in the circumferential direction from the area of the opening 7. The inclined surface 28 has the center of the opening 7 present. Is formed such that it starts from a position axially separated from the region of the radial plane by A and increases in diameter as it extends to both sides in the axial direction, and is separated from the region of the opening 7 by A in the axial direction. The smallest diameter part continues. In this case, the outer surface of the boss member 5 other than the inclined surface 28 is cylindrical, but may be formed in a polygonal column. Also, this inclined surface 28
The length, width and inclination angle can be arbitrarily set according to the required situation.

A set ring 12 is arranged on the boss member 5 so as to be movable in the axial direction, and the set ring 12 is a sleeve.
31 and a protruding portion fixed to this sleeve for holding the ball 8 protruding inward from the substantially central portion in the lock position
And a groove 14 is formed at a position deviated from the center of the opening 7. 38th set ring 12
To retain it in the position shown, one circular spring ring 24 having three inwardly projecting recesses 40, as shown in FIG. 40, is placed with a contracting force on the boss member. In this spring ring 24, the recess 40 has an inclined surface 28.
The other part is engaged with the groove 14 of the protrusion 30 of the set ring 12. The spring ring 24 has an inwardly contracting force, and the recess 40 tends to slide on the inclined surface 28 so as to be positioned at the minimum diameter portion, so that the set ring 12 is shown in FIGS. 38 and 42. Held in locked position. At the end of the boss member 5, a set ring 12 and a spring ring are attached.
Stop the stopper so that 24 does not come off from the boss member 5.
18 are provided.

The state shown in FIG. 38 is a state before the shaft 6 is inserted into the hole 4 of the boss member 5, but in this state, the ball 8 is placed in the boss member 5.
In order to prevent the ball 7 from falling into the hole 4, the inner end of the opening 7 for accommodating the ball is made small to have an inner surface of, for example, 60 °.

When connecting the shaft 6 and the boss member 5, as shown in FIG. 41, first hold the set ring 12 by hand and press the spring ring.
The set ring 12 is moved in the axial direction (right side) against the axial component force generated by the pressure contact of the inclined surface 28 with the inclined surface 28.
At this time, the parts of the spring ring 24 other than the recess 40 are
, The spring ring 24 is carried while expanding with the set ring. Thereafter, the boss member 5 is moved toward the shaft 6 together with the joint yoke 2 while pushing in the direction of inserting the set ring 12 so that the shaft 6 enters the hole 4 of the boss member 5 deeper. In this case, the set ring
Since the twelve ball pressing protrusions 30 do not exist in the area of the opening 7, the ball 8 is in a state in which it can move outward. When the shaft 6 comes into the hole 4 in this state, the ball 8 is pushed outward by the cam action of the chamfered portion 132 provided at the tip of the shaft 6, allowing the shaft 6 to enter. At the binding / dissociable position of the set ring 12 (Figs. 41 and 43),
If the shaft 6 reaches the area of the opening 7, the set ring 12
Even if the hand is removed from the set ring 12, the projecting portion 30 abuts on the ball 8 so that the set ring 12 cannot return to the locked position. However, when the set groove 10 provided on the shaft 6 reaches the opening 7, the recess 40 of the spring ring 24 slides on the inclined surface 28, and the ball 8 is pushed inward by the protrusion 30 of the set ring 12. Since part of it fits in the set groove 10, the set ring 12 automatically returns to the locked position, and the shaft 6 does not come off from the hole 4 of the boss member 5 (Fig. 42). In this case, since the spring ring 24 slides to the minimum diameter portion where the inclined surfaces 28 on both sides are joined, the set ring 12 can be stably held in the lock position. Next, when pulling out the boss member 5 from the shaft 6, the operation reverse to the above is performed. That is, the set ring 12 is moved to the position shown in FIG. 43, and the boss member 5 is separated from the shaft 6 as it is. At this time, the ball 8
Moves outward, but contacts the inner surface 38 of the sleeve 31 and does not fall off. When the boss member 5 is separated from the shaft 6,
The set ring 12 automatically returns to the locked position.

FIG. 39 is a sectional view taken along the line VV of FIG.
Although the arrangement of the openings and the openings 7 is clearly shown, the number of inclined surfaces and the outer surface of the boss member are arbitrarily formed, for example, 4 inclined surfaces.
Needless to say, it can be changed by providing the boss member with an external surface in a hexagonal column shape. FIG. 40 is a detailed view of the spring ring 24, showing its shape and recess.
The number of 40 and the like can be changed according to the boss member and the inclined surface. It goes without saying that the spring rings 24 and 124 having the shape of the first invention can be applied to all of the second invention, and that of the second invention can be applied to all of the first invention.

The coupling device shown in FIGS. 44 and 45 is very similar to that of the previous embodiment, except that the one shown in FIG.
The difference is that the sleeve 31 and the protrusion 30 are separately formed, and the sleeve 31 has a protrusion 36 protruding inward to form the groove 14 between the sleeve 31 and the protrusion 30. . Also, in FIG. 45, the protrusion 30 and the sleeve 31 for pressing the ball of the set ring 12
The difference is that they are integrally formed. Note that the protrusion 30
A groove 14 is formed in the groove.

A modified example of the coupling device shown in FIGS. 38 to 43 is shown in FIG. In this case, the three sloped surfaces 28 joined in the smallest diameter part
Is different from that described above in that it is arranged at a distance L from the region of the opening 7 in the axial direction. Therefore, the set ring
12 is also extended in the axial direction, and a groove 14 with which a spring ring 24 is engaged is formed inside the extended portion. A recess 40 for accommodating the ball 8 is formed between the portion where the groove 14 is formed and the protrusion 30 at the coupling / disengageable position, and the protrusion 30 is located in the area of the opening 7. Is arranged.

In the structure shown in FIG. 47, the inclined surface 28 is provided on the outer surface of the boss member 5 on the joint yoke 2 side where the diameter is enlarged, and the set ring 12 is also extended to above the inclined surface 28. It has a flange portion 130 that extends inwardly toward the inclined surface 28. The flange portion 130 is formed with a groove 14 for accommodating a portion other than the recess 40 of the spring ring 24 that is pressed against the inclined surface 28.

48 and 49 show an example in which the inclined surface 28 is formed on the member 48 integrally attached to the boss member 5. In FIG. 48, an inclined surface 28 is formed on the outer surface of an annular member 48 having a substantially U-shaped cross section.
Is formed, and the set ring 12 is extended to the area where the inclined surface 28 is provided, and the recess 40 accommodates the spring ring 24 in which the recess 40 is pressed against the inclined surface 28 in the flange 130 of the extended portion. Groove 14 is formed.

Further, in FIG. 49, the inclined surface 28 has an annular member similar to that in FIG.
It is provided on the inner surface of 48, and in this case, the spring ring 24 that has the force to expand is used, and the part other than the recess 40 is pressed against the inclined surface 28, and the part of the recess 40 is set. It engages with a groove 14 provided on the outer surface of the ring 12. Also in these cases, since the spring ring 24 has a force of contracting or expanding, the cam action of sliding down on the inclined surface 28 to the bottom causes the set ring to pass through the groove 14. Holds 12 axially in the locked position.

Next, an example in which the inclined surface 28 is provided on the set ring 12 will be shown. First
50 and 51, the inclined surface 28 is provided on the inner surface of the set ring 12 apart from the area of the opening 7, and the spring ring 24 is pressed against the inclined surface 28 with the force of expanding. , The groove 40 provided in the recess 40 in the boss member 5
Is engaged with. The projection 30 of the set ring 12 is in the area of the opening and has an axially extending flange 140 on the side opposite to the side on which the inclined surface 28 is provided. FIG. 51 shows a state in which the shaft is inserted into the hole 4 of the boss member 5, and the ball 8 is pushed by the shaft to move outward, but the flange 140
It does not fall out due to the presence of the

In FIG. 52, an example is shown in which the inclined surface 28 is provided on the inner surface of the set ring 12 extending to the outside of the boss member 5 whose diameter on the joint yoke 2 side is enlarged, and the groove 22 is provided on the outer surface of the corresponding boss member 5. It was Again, the spring ring 24 is the same as in the previous example.

In the structure shown in FIG. 53, an inclined surface 28 is provided on the outer surface of the set ring 12, and the spring ring 24 has a contracting force. In this case, the recess 40 of the spring ring 24 is in pressure contact with the inclined surface 28, and the spring ring 24
The groove 22 formed in the inner surface of the annular member 48 integrally attached to the boss member 5 whose other portion extends to the region of the inclined surface.
Is engaged with.

In the embodiment shown in FIGS. 38 to 53, the inclined surface 28
3 at approximately equal intervals in the circumferential direction, the spring ring 24
Although the one shown in Fig. 40 was also used, the combination of the inclined surface and the spring ring is such that the inclined surface is configured as a conical surface over the entire circumference and different spring rings are assembled as shown in Figs. 29 to 37. It goes without saying that they can be used together. That is, what is shown in FIGS. 28 to 37 is
It is also applicable to all those shown in FIGS. 38 to 53.

Next, an example in which the operating force for connecting the shaft and the boss member and the force for holding the shaft at the connecting position are increased will be shown.

The coupling device shown in FIGS. 54-57 is similar to that of FIGS. That is, on the outer surface of the boss member 5, three inclined surfaces 28 that start from the region of the opening 7 and increase in diameter as they move away from the opening are provided on both sides of the opening 7 at substantially equal intervals with the opening 7 being circumferentially out of phase with each other. Are provided independently of each other. The spring rings 24 and 124 in which the recess 40 is pressed against the inclined surfaces 28 and 128 are in contact with the side surface of the ball pressing protrusion 30 of the set ring 12 except the recess 40, and the set ring 12 is axially attached from both sides. Holds in the locked position in the direction. In this example, compression coil springs 16 and 116 that press the set ring are arranged on both sides of the set ring 12. One end of the compression coil springs 16 and 116 is the set ring and the other end is the stopper 18 and the joint yoke, respectively. It is supported by spring bearings 20, 120 supported by two stoppers. The spring forces of the compression coil springs 16 and 116 are almost equal. The set ring 12 has a flange that prevents the ball 8 from falling out at the coupling / disconnecting position.
36 and 136 are formed. FIG. 57 is an operation process diagram, in which the set ring 12 is at a position where binding / disengaging is possible. That is, the set ring 12 is moved to the right against the axial component force of the compression coil spring 16 and the spring ring 24.
In this position, the protrusion 30 for pressing the ball of the set ring 12
Is away from the area of the opening 7, the shaft 6 has been inserted and the ball 8 has moved outwards. At this position, the flange 136 and the spring ring 124 provided on the set ring 12 prevent the ball 8 from falling out. In this state, when the hand holding the set ring 12 is released, the set ring 12 slightly moves to the left by the restoring force of the compression coil spring 16 and the spring ring 24, but the set ring 12 moves to the ball 8 pushed outward by the shaft 6. Since the protrusion 30 for pressing the ball of the set ring 12 is engaged, the set ring 12 can be released even if the hand is released.
12 cannot move to the left anymore.

When pulling out the boss member from the spline shaft 6, the set ring 12 may be moved against the spring force of the compression coil spring 116 and the spring ring 124. The other structure and operation are the same as those of the first embodiment, and the description thereof will be omitted. In this embodiment, since the compression coil spring is also used, the operating force at the time of coupling is increased and the force for holding the set ring in the lock position is increased, so that it is possible to withstand a large impact.

Needless to say, the combined use of the compression coil spring and the spring ring is sometimes applied to all the above-described embodiments.

The spring bearings 20 and 120 can be manufactured by press forming a steel plate, but may be made of plastic. Instead of the compression coil springs 16 and 116, known compression springs such as leaf springs and wavy springs may be used. It is also easy to analogize that a tension spring may be used instead of the compression spring.

The one shown in FIG. 58 is similar to that of the previous embodiment, but the compression coil spring 1 supported by the spring bearings 20 and 120.
The difference is that 6 and 116 do not directly press the set ring 12 but press them via the other spring bearings 45 and 145. The spring bearings 20 and 120 are formed with flanges 34 and 134 on the outer side, and are configured to engage with the flanges 49 and 149 of the other spring bearings 45 and 145, respectively. Therefore, the compression coil springs 16 and 116 are arranged so as not to extend beyond a predetermined value. In the maximum extension position of the compression coil spring 16 or 116, where the flanges 34 and 134 engage the flanges 49 and 149, respectively, the inner end surfaces 52 and 152 of the spring bearings 45 and 145 are located approximately in the center of the opening 7, The ring 8 is at a position where the ring 12 can be connected / disconnected and prevents the ball 8 from falling out. The other structure is similar to that of the previous embodiment.

59 and 60 show a modification of the embodiment shown in FIGS. 54 to 58. That is, in this example, the inclined surface 28 and the spring ring 24 are omitted. A spring bearing 20 supported by a stopper 18 provided on the boss member 5 and a spring bearing 120 which is positionally regulated by a step portion 117 of the boss member and which engages with a step portion 119 provided on the inner surface of the set ring 12. A compression coil spring 16 is arranged between the two. Furthermore, the spring bearing
A claw 53 that engages with 20 is formed on the inner surface of the cylindrical end of the set ring 12. As a result, the compression coil spring 16 presses the set ring 12 in the axial direction, the stepped portion 117 on the boss member 5 engages with the spring bearing 120, the axial sliding is restricted, and the projection for ball pressing is provided. The part 30 is located in the area of the opening 7. This holds the set ring 12 in the locked position.

FIG. 60 is an operational process diagram corresponding to FIG. 57 of the above embodiment. The set ring 12 is moved to the spline shaft side, that is, to the right side in FIG. 59, against the force of the compression coil spring 16. In this position, the ball pressing protrusion 30 of the set ring 12 is located away from the ball 8, so that the spline shaft 6 is inserted and the ball 8 moves outward.

Since the spring bearing 120 is engaged with the step portion 119 of the set ring 12, it moves to the right side as viewed in FIG. 59 together with the set ring 12. The collar 138 of the set ring 12 prevents the set ball 8 from falling out.

In this state, when the hand holding the set ring 12 is released, the set ring 12 is moved to the 60th position by the restoring force of the compression coil spring 16.
Although it returns slightly to the left as seen in the figure, as is apparent from FIG. 60, the set ball 8 pushed outward by the spline shaft 6 is engaged with the projection 30 of the set ring 12 for holding the ball. As a result, the set ring 12 cannot move to the left anymore even if the hand is released. When the shaft 6 is further inserted into the hole 4, when the groove 10 of the shaft 6 reaches the area of the opening 7, the ball 8 is pushed by the protruding portion 30 of the set ring 12 to move inward and engage with the groove 10. To meet. At this time, the set ring 12 moves to the left and automatically returns to the locked position. When the boss member is pulled out from the spline shaft 6, the set ring 12 may be moved against the force of the compression coil spring 16. At this time, since the spring receiver 20 is engaged with the claw 53 of the set ring 12, it moves to the right side as viewed in FIG. 59 together with the set ring 12.

61 to 63 show modified examples of the coupling device shown in FIGS. 1 to 6. In this case, the inclined surface 28 starting from the region of the opening 7 is formed only on one side of the opening 7. The inclined surfaces 28 are arranged at substantially equal intervals with the phase shifted from the opening 7 in the circumferential direction. A groove 128A with which the flat portion 50 of the spring ring 124 engages is provided at a position axially separated from the inclined surface 28 across the opening 7. In connecting and disconnecting the boss member 5 and the shaft 6, the set ring 12 is connected to the opposite side of the spline shaft, that is, to the left side in FIG. 61, against the spring force of the spring ring 24, as shown in FIG. -Move to the disengageable position and move the protrusion 30 out of the area of the opening 7 allowing the ball 8 to move radially outward. In this case, as shown in FIG. 62, even if the shaft 6 is inserted and the ball moves outward, the spring ring
Since the corner portion 51 of 124 abuts on the ball 8, the ball 8 does not drop out. The other operations are the same as the previous ones, and thus the description thereof is omitted here. Although not shown,
It goes without saying that the coupling device shown in FIG. 38 to FIG. 43, in which the inclined surface 28 starting from the vicinity of the area of the opening 7 and extending to both sides in the axial direction is formed on only one side, is the same as the above modification. That is, when the embodiment shown in FIGS. 1 to 60 is applied to only one side, the set ring 12 is required to be operated in a direction opposite to the direction in which the phos member 5 is moved when connecting or disconnecting. Obviously, it can be applied to

Next, the substantially triangular shape used in the above-mentioned embodiment,
A spring ring having a force to contract or a force to expand will be described. When the spring ring shown in FIG. 64 is arranged on the inclined surface of the boss member or set ring having an outer diameter larger than the inner diameter Ds of the spring ring in the free state, it has a force to shrink in the radial direction.
When placed on an inclined surface of a host member or set ring having an inner diameter smaller than the outer diameter D of the spring ring as shown in the figure, it has a force to expand in the radial direction, and both of them have the same axis. It may have a directional expansion force. These spring rings are configured as annular springs with slits 33.

In this type of annular spring, as shown in FIG. 66A, a wire rod is wound up on a triangular prism base material or another polygonal prism base material or a cylindrical base material, and then a slit as indicated by a symbol C is processed ( (Fig. 66B). In this case, the cross-sectional shape of the wire is not limited to a circular shape, and any arbitrary shape can be selected. Therefore, it is possible to manufacture a spring ring shown in FIG. 66C, which has a misaligned abutment, and the misalignment of the abutment can be set to a desired value. Such a spring ring 24 is provided, for example, in the groove 14 of the set ring 12 in the embodiment shown in FIGS. 38 to 53.
, The width of the groove 14 is smaller than the width B of the spring ring 24, so that the spring ring has an axial expansion force of 6. Furthermore, the spring ring 24 is expanded to set ring
When assembled together with 12 to the boss member 5, the spring ring 24
Since the inner diameter DS in the free state is smaller than the minimum outer diameter of the inclined surface 28 of the boss member 5, the spring ring 24 has a force to contract in the radial direction. Therefore, the spring ring 24 is engaged in the groove 14 of the set ring 12 without play and is held on the boss member 5 without moving in the axial direction. Therefore, noise and wear due to rattling and vibration can be prevented.

In order to more reliably apply the radial and axial forces of the spring ring 24, the spring ring may be wound with a wavy wire as shown in FIG. 67A, or 67B.
When the rolled-up product is pressed as shown in the figure and formed as shown in FIG. 67C, sliding on the inclined surface and the boss member is improved, and there is no rattling, which is more preferable.

[Curing of invention]

Since the coupling device according to the present invention has a small number of parts and a simple structure, it is extremely easy to manufacture and assemble, and the coupling and disengagement of the shaft can be performed safely and reliably. Further, in use, the shaft and the boss member can be connected and disconnected by simply holding the set ring by hand and moving the boss member in the direction in which the hole of the boss member enters or leaves the shaft. That is, when the boss member is moved such that the shaft is inserted in the hole of the boss member or the shaft is separated from the hole of the boss member, the set ring is moved in the same direction as the direction in which the boss member is moved, and the coupling and Since the dissociation operation can be performed, compared to the conventional one that requires the set ring to operate in the direction opposite to the direction in which the boss member is moved,
The operations required for binding and dissociation are easy, and ergonomics are excellent.

[Brief description of drawings]

1 to 6 show a coupling device according to the first embodiment.
The figure is a longitudinal sectional view thereof, FIG. 2 is a sectional view taken along the line II of FIG. 1, FIG. 3 is a view showing a spring ring, FIGS. 4 to 6 are diagrams for explaining an operating process, and FIG. 7 is an inclined surface. FIG. 8 is a diagram showing an example in which the inclined surface is provided in another place, FIG. 8 is a diagram showing an example in which the inclined surface is provided in another portion, and FIGS. FIG. 11 is a view showing what is provided, FIGS. 11 and 12 are views showing examples in which the orientation of the inclined surface is different, and FIGS. 13 to 16 are views showing examples in which the inclined surface is provided at various different positions, and FIGS. 19th
The figure shows the inclined surface arranged on the inner surface of the set ring, FIGS. 20 to 22 show the inclined surface at different positions of the set ring, and FIGS. 23 to 24 show the inclined surface provided on the set ring. FIG. 25 to FIG. 27 are views showing an example in which the tilt direction is changed, FIG. 25 to FIG. 27 are views in which the tilt surfaces are arranged in different regions, FIG. 28 is a view showing a different example of the set ring, and FIG. 29 to FIG. FIG. 30 is a view showing a coupling device in which is formed as a conical surface.
Fig. 31 is a sectional view taken along line II-II, Fig. 31 is a view showing a spring ring, and Figs. 32 to 34 are views showing an example using a conical inclined surface and a substantially triangular spring ring. 32 is a sectional view taken along line III-III in FIG. 32, FIG. 34 is a view taken in the direction of arrow Z in FIG. 33,
35 to 37 are views showing an example in which a conical inclined surface and a circular spring ring are combined, and FIG. 36 is a view of FIG.
IV-IV sectional view, FIG. 37 is a view showing a spring ring,
38 to 43 are views showing a coupling device in which the inclined surfaces are continuous and one spring ring is used, FIG. 44 is an example in which the projecting portion of the set ring is formed separately, and FIG. 45 is the projecting portion. FIG. 46 to FIG. 49 are views showing an example in which the inclined surface is provided at different positions of the boss member, and FIG. 50 and FIG. 51 are the inclined surfaces of the set ring. Fig. 52 and Fig. 53 show examples of installation on the inner surface, Fig. 52 and Fig. 53 show inclined surfaces provided at different positions of the set ring, and Figs. 54 to 58 show operation force and holding force by adding a compression coil spring. FIG. 59 and FIG. 60 show a modified example of FIG. 54 to FIG. 58, and FIG. 61 to FIG. 63 show the modified example of FIG. Figure 66A, 66 showing a modified example of Figure 6.
B, 66C, 64, 65 and 67A, 67B, 67C are views for explaining the spring ring. Reference numeral 2 ... Joint yoke, 4 ... Boss member hole, 5 ... Boss member, 6 ... Shaft, 7 ... Opening, 8 ... Ball, 10 ... Shaft groove, 12 ... Set ring , 12A ...... Set ring sleeve, 14 …… Set ring groove, 16,116 …… Compression coil spring, 18,118 …… Stopper, 20,120 …… Spring bearing,
21 …… Cylindrical part of boss member, 22 …… Groove of boss member, 24,
124 …… Spring ring, 26,126 …… Side of projecting part of set ring, 28,128 …… Inclined surface, 29,129 …… Notched surface, 30 …… Projecting part of set ring, 30A …… Projecting part of set ring , 31 …… Set ring sleeve, 32 …… Stop ring, 33 …… Slit, 34,134 …… Spring bearing flange, 36,136 …… Flange, 38,138 …… Sleeve inner surface, 40 …… Set Ring recess, 45,145 …… Spring bearing, 48 …… Annular member, 49,149 …… Spring bearing flange, 50 …… Spring ring flat portion, 51 …… Spring ring corner portion, 52,152 …… Spring bearing The inner end of the, 53 ...
… Claws, 117, 119… Steps, 128A… Grooves, 130… Flange, 132… Chamfered part, 150… Convex part, 160… Flange

Claims (34)

[Claims] 1. A boss member having an axially extending hole therein and an opening extending in the radial direction which opens into the hole, and a shaft which fits into the hole of a boss member having a circumferentially extending set groove on its outer surface. , Locking position where a part of it protrudes inward from the opening and engages with the shaft setting groove, and external coupling that does not engage with the setting groove.
The locking element is arranged in the opening so as to be located at the disengageable position and is movable in the radial direction, and the set ring is arranged in the axial direction so as to be movable on the boss member, and the set ring locks the locking element. In a detachable coupling device that is axially biased by a spring so as to be always positioned in a position, two sloping surfaces (28, 128), each of which has an independent diameter, increases or decreases as it extends in the axial direction. Two spring rings (2) provided on the outer surface of the member (5) or on the inner surface or outer surface of the set ring (12) and partly contacting the set ring (12) or the boss member (5), respectively.
4,124) are in pressure contact with the inclined surfaces (28,128), respectively, and one of the spring rings (24,124) is inserted into and pulled out of the shaft (6) from the hole (4) of the boss member (5) and one of the inclined surfaces (24,124) 28, 128) A detachable coupling device characterized in that the set ring (12) automatically returns to the locked position from the coupling / disengaging position by sliding on it. 2. The inclined surface (28, 128) is formed on the outer surface of the boss member (5) and is inclined so that the diameter decreases toward a radial plane in which the opening (7) is present, Is arranged on the inclined surface (28,128) so that the spring rings (24,124) abutting on both sides of the projecting portion (30) of the set ring (12) have a contracting force. The detachable coupling device according to item 1. 3. The inclined surface (28, 128) is formed on the outer surface of the boss member (5) and is inclined so that the diameter thereof decreases as the opening (7) moves away from a radial plane.
Part of the flange (36,13) on the protruding part of the set ring (12)
The detachable coupling device according to claim 1, wherein the spring ring (24,124) abutting against 6) is arranged on the inclined surface (28,128) so as to have a contracting force. 4. The inclined surface (12, 128) is a set ring (1).
It is formed on the inner surface of 2) and is inclined so that the diameter increases in the radial direction in which the opening (7) is present, and a part of it is formed on each side of the protrusion (160) of the boss member (5). The detachable coupling device according to claim 1, wherein the abutting spring rings (24,124) are arranged on the inclined surfaces (28,128) so as to have a spreading force. 5. The inclined surface (28,128) is a set ring (1).
The spring ring is formed on the inner surface of 2) and is inclined so that the diameter decreases in the radial direction in which the opening (7) is present, and a part of which is in contact with the stopper (18, 118) of the boss member (5). Removable coupling device according to claim 1, characterized in that the (24,124) is arranged on the inclined surface (28,128) so as to have a spreading force. 6. The inclined surface (28, 128) is a set ring (1).
An annular member formed on the outer surface of 2), inclined so that the diameter increases toward the radial plane in which the opening (7) is present, and a part of which is integrally fixed to the boss member (5). (48)
Spring ring (2) that abuts the flange (18,118) of
Inclined surface (28,128) so that 4,124) has the force to contract
Claim 1 characterized in that it is arranged in
A detachable coupling device according to item. 7. An inclined surface (28,128) is arranged at a distance L in the axial direction from the area of the opening (7) of the boss member (5). A detachable coupling device according to any one of paragraphs. 8. The joint yoke (2) in which the inclined surface (28,128) is formed.
The boss member (5) on the side is formed on the portion where the diameter is enlarged or on the inner surface or the outer surface of the set ring (12) extended to the same portion, according to any one of claims 1 to 6. The detachable coupling device according to any one of claims. 9. The scope of claim 1, wherein the inclined surface (28, 128) is formed on an inner surface or an outer surface of an annular member (48) integrally fixed to a boss member (5). The detachable coupling device according to any one of 6 above. 10. The sloping surface (28, 128) is a boss member (5).
The detachable coupling according to any one of claims 1 to 9, which is formed as a conical surface over the entire circumference of the outer surface of the set ring or the inner surface or the outer surface of the set ring (12). apparatus. 11. The boss member (5) is formed in a cylindrical shape or a polygonal column shape, and has at least two inclined surfaces (28, 12).
Claim 1 is characterized in that 8) is formed.
A detachable coupling device according to any one of claims 9 to 9. 12. The method according to claim 1, wherein the inclined surface (28) starts in the area of the opening (7) of the boss member (5). Detachable coupling device. 13. The set ring (12) comprises a projection (22) for radially supporting the locking element (8) in the opening (7) in the locked position in which the locking element (8) engages (10) of the shaft (6). 30) and this protrusion (30
A) The removable sleeve according to any one of claims 1 to 12, characterized in that it is formed separately from (A) and a sleeve (12A) that holds this protruding portion. Coupling device. 14. The spring ring (24,124) has a substantially circular shape having one slit (33) and at least two protrusions (150) or recesses (40). The detachable coupling device according to any one of 1 to 13. 15. The spring ring (24,124) according to claim 1, characterized in that it has one slot (33) and a corresponding number of flats (50) and corners (51).
A detachable coupling device according to any one of claims 13 to 13. 16. The flat portion of the spring ring (24) is formed in at least one location of an inclined surface (28) formed as a conical surface surrounding the entire circumference, wherein the spring ring (24,124) is formed in a polygonal shape. Inclined surface (28) with which (50) engages
15. The detachable coupling device according to claim 14, characterized in that a flat notch surface (29) formed in parallel with is provided. 17. The spring ring (24) is formed in a polygonal shape or a circular shape having one slit (33), and the facing abutment has the width of the groove (14) of the set ring (12) or The detachable coupling device according to any one of claims 7 to 9, wherein the boss member (5) has a width greater than that of the groove (22). 18. The method according to claim 1, wherein the spring ring (24) is made of a wire bent in a wavy shape, or the wire is rolled up and then wavy by a press. A detachable coupling device according to any one of paragraphs. 19. A boss member having an axially extending hole therein, a radially extending opening opening to the hole, and a shaft fitted into the hole of the boss member having a circumferentially extending set groove on its outer surface. , Radially movable in the opening so that it can be located in a locked position where a part of it projects inward from the opening and engages with the set groove of the shaft, and an outer connectable / disconnectable position that does not engage with the set groove And a set ring disposed on the boss member so as to be movable in the axial direction, and the set ring is urged in the axial direction by a spring so as to always position the locking element in the lock position. In a detachable coupling device, an inclined surface (2 that increases or decreases in diameter as it extends axially on both sides and continues at the minimum or maximum diameter)
8) is the outer surface of the boss member (5) or the set ring (12)
Part of which engages with the grooves (14, 22) provided on the inner surface or the outer surface of the boss member (5) or the inner surface of the set ring (12) that does not have an inclined surface. One spring ring (24) is in pressure contact with the inclined surface (28) and the spring ring (24) is inserted into and pulled out of the shaft (6) from the hole (4) of the boss member (5). A detachable coupling device characterized in that the set ring (12) automatically returns to the locked position from the coupling / releasing position by sliding on the inclined surface (28). 20. The inclined surface (28) is formed on the outer surface of the boss member (5) and is inclined so that the diameter decreases toward a radial plane in which the opening (7) is present, The spring ring (24) engaging with the groove (14) provided on the inner surface of the set ring (12) is arranged on the inclined surface (28) so as to have a contracting force. A detachable coupling device as set forth in claim 19. 21. The inclined surface (28) is a set ring (12)
Is formed on the inner surface of the boss member (5), and the opening (7) is inclined so that the diameter increases toward the radial plane, and a part of the groove (22) is formed on the outer surface of the boss member (5). 20. The detachable coupling device according to claim 19, characterized in that the engaging spring ring (24) is arranged on the inclined surface (28) so as to have a spreading force. 22. The inclined surface (28) is a set ring (12)
The inner surface of the annular member (48) formed on the outer surface of the annular member (48), which is inclined so that the diameter decreases toward the radial plane in which the opening is formed, and a part of which is integrally fixed to the boss member (5). 20. The attachment / detachment according to claim 19, characterized in that the spring ring (24) engaging with the groove (22) provided in the groove is arranged at the inclination (28) so as to have a contracting force. Flexible coupling device. 23. The sloping surface (28,128) is a boss member (5).
23. Removable coupling device according to any one of claims 19 to 22, characterized in that it is arranged at a distance L from the region of the opening (7) in the axial direction. 24. The inclined surface (28, 128) is formed on an inner surface or an outer surface of a set ring (12) extended to the portion where the diameter of the boss member (5) on the joint yoke (2) side is enlarged. What is claimed is:
23. The detachable coupling device according to any one of 19 to 22. 25. The sloping surface (28, 128) is a boss member (5).
The detachable coupling device according to any one of claims 19 to 22, which is formed on an inner surface or an outer surface of an annular member (48) integrally fixed to the. 26. The inclined surface (28, 128) is a boss member (5).
The detachable coupling device according to any one of claims 19 to 25, characterized in that it is formed as a conical surface over the entire circumference on the outer surface of the set ring or on the inner or outer surface of the set ring (12). . 27. The boss member (5) is formed in a cylindrical shape or a polygonal column shape, and has at least two inclined surfaces (28, 12).
Claim 9 is characterized in that 8) is formed.
26. The detachable coupling device according to any one of 25 to 25. 28. A method according to any one of claims 19 to 21, characterized in that the inclined surface (28) starts in the region of the opening (7) of the boss member (5). Detachable coupling device. 29. The set ring (12) comprises a projection (22) for radially supporting the locking element (8) in the opening (7) in the locked position in which the locking element (8) engages the (10) of the shaft (6). 30) and this protrusion (30
29. Removable connection according to any one of claims 19 to 28, characterized in that it is formed separately from (A) and a sleeve (12A) that holds this protrusion. apparatus. 30. The spring ring (24,124) is substantially circular with one slit (33) and at least two protrusions (150) or recesses (40). The detachable coupling device according to any one of items 19 to 29. 31. The spring ring (24,124) according to claim 19, characterized by having one slit (33) and a corresponding number of flats (50) and corners (51).
29. The detachable coupling device according to any one of items 28 to 28. 32. The spring ring (24,124) is formed in a polygonal shape, and a flat portion of the spring ring (24) is provided at least at one position of an inclined surface (28) formed as a conical surface surrounding the entire circumference. Inclined surface (28) with which (50) engages
27. A detachable coupling device according to claim 26, characterized in that a flat notch surface (29) formed in parallel with is provided. 33. The spring ring (24) is formed in a polygonal shape or a circular shape having one slit (33), and the facing abutment has a width of a groove (14) of the set ring (12) or 26. The detachable coupling device according to any one of claims 19 to 25, characterized in that the width of the groove (22) of the boss member (5) is larger than that of the groove (22). 34. The method according to claim 19, wherein the spring ring (24) is made of a wire bent in a wavy shape, or is corrugated by a press after the wire is rolled up. A detachable coupling device according to any one of paragraphs.